And in the bargain elide a variable, and make it clearer
what the return value is at two early exit points.
[This change makes use of the fact that TRUE (successful write) == 1
and FALSE (failed write) == 0. But this is already used twenty lines
earlier, for the other call of write_file().]
Web links and email addresses do not belong in the version information.
This has bothered me for a long time. The URL is in the man page, and
bug reports should go to Savannah.
The terminal window in the graphical Debian installer (the default)
produces the same escape sequences as xterm for F1 to F4. Though
TERM is set to xterm, the xterm terminfo data is not available, so
ncurses is unable to translate the sequences for us. :| Therefore,
recognize the relevant raw escape sequences.
Also, eat all bytes of the non-recognized modified function and arrow
keys, so that they do not enter junk into the buffer.
The tiny version is probably only ever used in the Debian installer,
on the bterm terminal, which produces escape sequences like those of
a Linux console. So, exclude all other raw sequences.
(After support for Slang has been removed, we can maybe even exclude
ALL raw sequences from the tiny version, and the corresponding option
(-K/--rawsequences) too.)
At least since version 229 of xterm (from August 2007), the escape
sequences for F1 to F4 have been "Esc O P" to "Esc O S". There is
no bracket in those sequences, and there probably never was -- most
likely the extra "[" in nano's code was a slip of the fingers.
Trying to determine which syntax to apply with the help of libmagic
can be a somewhat time-consuming and yet often still fruitless affair.
Therefore using libmagic should not be the default; it should require
an option to tell nano to try using libmagic when it can't determine
the applicable syntax from the file's name or first line.
This is better than having a --nomagic option (and using libmagic by
default), because when the user has 'set nomagic' in their nanorc or
--nomagic in their alias, then switching the use of libmagic back on
is troublesome. But with --magic (and not using libmagic by default),
when nano fails to recognize a file, it is a simple ^X, add -! to the
command line, and restart.
The short form of the option is -! because we have run out of letters.
This addresses https://savannah.gnu.org/bugs/?59028.
With --stateflags (short form: -%) or 'set stateflags', nano reserves
the righthand end of the title bar not for showing "Modified" but for
showing the state of auto-indentation (I), the mark (M), the breaking
of long lines (L), macro recording (R), and softwrapping (S).
When the buffer is modified, this is indicated with a star (*) after
the file name (shown in the center of the title bar).
This fulfills https://savannah.gnu.org/bugs/?57953.
Requested-by: Sébastien Desreux <seb@h-k.fr>
Typing ^H (by default equivalent to Backspace) at the start of the file
is not useful. When it happens, assume that the user is new and tried
to ask for Help. So... explain what the caret and the "M-" in the help
lines mean.
Benno Schulenberg